Features: For ensuring corners and suitable for flight, road cases, trunks, speaker, tool box, aluminum box, chassis, luggage, etc. Specification: Color:Black Material:Iron Per Leaf Length:73mm/2.9" Leaf Maximum Width:40mm/1.6" Mounting Hole Diameter:5mm/0.2“ Mounting Hole Center Distance:17mm/0.67” Package Includes: 8 x Ball Corners Some Screws Note: Due to the manual measurement,there may be small deviations. The color may have different as the difference display,please understand.